Sven Brandau

Embedded Linux: Adjustment Display Driver

Senior Software Developer

• Industry: Electrical Engineering
• Role: Integration
  • Adjustment of the Display Driver
  • Implement Device Tree
  • Platform: Renesas RZ/G2L
  • OS: Yocto

Embedded Development in the Field of Low Power

Senior Software Architect/Developer

• Industry: Electrical Engineering
• Role: Architecture / Implementation / Integration
  • Bare-metal application for an STM32L5 MCU
  • QtCreator, C/C++ 20, Git
  • Interrupt-driven Low Power State Machine (power consumption in the µA range)
  • Implementation of required hardware units: DMA, PWM, GPIOs
  • Remote work

NB-IoT Embedded Development

Senior Software Architect/Developer

• Industry: Electrical Engineering
• Role: Software Architect/Developer
  • Prototype development in the field of NB-IoT / CAT-M1
  • Software: QtCreator, GCC Toolchain, CMake, J-Link GDB, Git
  • Hardware: Nordic nRF9160 / Nordic nRF52850
  • Integration of sensors and PMIC via SPI/I²C
  • Cellular modem integration
  • Complete bare-metal application development: bootloader, linker scripts, C++ startup, Secure/Non-Secure Cortex-M
  • Connection to Amazon AWS IoT Core

Embedded Development for Mass Spectrometer II

Senior Software Architect/Developer

• Industry: Electrical Engineering
• Role: Architecture / Implementation / Integration
  • Bare-metal application for NXP LPC43xx and NXP RT1062 SoCs
  • Software: FreeRTOS, LittleFS, CycloneTCP
  • IDE: MCUXpresso, C/C++ 20, Git
  • Hardware: NXP LPC43xx, NXP LPC1347, NXP RT1062
  • Integration of all external hardware via SPI, I²C, OneWire, UART, GPIOs; FPGA via Memory Controller
  • Remote work

Audio Driver Development for Embedded Linux

Senior Software Developer

• Industry: Consumer Electronics
• Role: Implementation
  • Development of the audio driver for the STA350 audio chip
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/sound?id=2439ea1f0f8f4cc98dfae0d1cd5ba88f6c3ee9ad
  • Linux: Upstream Linux with Device Tree
  • Remote work

Embedded Linux for a Custom Platform

Senior Software Architect/Developer

• Industry: Defense
• Role: System Design, Architecture, Implementation, Configuration
  • Setup, customization, and configuration of the system (TI OMAP3 / NXP i.MX6 / i.MX8)
  • Driver implementation
  • Design and implementation of the application
  • Details:
    • Setup of build environment (gcc for ARM)
    • Assembling the appropriate components for the Linux system:
      • Bootloader: U-Boot + X-Loader / U-Boot MLO + Secure Boot
      • Kernel: 3.0.x to 6.x + Device Tree
      • RootFS: Buildroot, Qt5
    • Custom hardware adjustments in the bootloader:
      • Hardware initialization: SDRAM, NAND, GPIO, LCD, …
      • System boot from: MMC, NAND, NFS
      • Implement splash screen
    • Kernel adaptations:
      • CPU frequency scaling (dynamic switching based on profile)
      • Integration of LCD display drivers (Parallel, LVDS, MIPI DSI)
      • Splash screen support
      • Power management with external IC
      • Audio support: Configure drivers for TI OMAP3
      • Custom USB device driver implementation:
        • Streaming data via DMA to the internal DSP of the TI processor
        • Implementation of custom algorithms on the internal DSP
      • Integration of WLAN drivers (RTL8188 and others)
    • RootFS adaptations:
      • Configuration of NAND filesystem: UBI-FS, ECC
      • Network configuration: ifplugd, DHCP, DNS, static IP, WLAN (wpa_supplicant)
      • Hotplug system with MDEV: USB stick automount, FTDI serial-USB, USB WLAN drivers
      • Audio support: ALSA system testing and integration
    • Full system features:
      • Implementation of an update mechanism:
        • Dual-boot system
        • Encryption of update package (AES256, SHA256)
        • Update of various sub-components: Detectors, Atmel ATMega via SPI
        • Update controlled via application
        • Update controlled via integrated web server (WebSockets)
    • Configuration of userspace drivers for SPI, I²C, GPIO
    • RTC and USB gadget drivers
    • Connectivity via Bluetooth and WiFi
    • Application development (Qt5, C++1x/2x)
    • Build server: Jenkins
    • Version control: Git
    • Bug tracking: Redmine
    • Remote work

Crypto Device Development

Requirements Engineer

• Industry: Security Sector
• Role: System Design, Architecture
  • Development of platform software for an embedded system
  • Creation of use cases
  • Requirements engineering
  • Architecture development
  • Description of use cases using DSL (Domain Specific Language)
  • Hardware platform: XILINX Zynq SoC

Embedded Development for Mass Spectrometer I

Senior Software Developer

• Industry: Electrical Engineering
• Role: Architecture / Implementation / Integration
  • New software development for a controller board
  • Control of various hardware components via USB, SPI, RS232, and DIO
  • Implementation of algorithms for the following components:
    • Board communication via USB from the host PC
    • Analog-to-digital converter (ADC) via SPI
    • Digital-to-analog converter (DAC) via SPI
    • Digital I/O via SPI
    • Bronkhorst IQFlow devices via RS232
    • Fan speed monitoring
    • Pump control via DIO
    • Firmware update via external SPI Flash
  • Development of a Windows test application in C# to verify functionality
  • Development of a firmware update tool in C# for Windows
  • Programming languages: C/C++, C#
  • Environment: MS Visual Studio, RedSuite, Git, ARM Compiler, Make, Eclipse
  • Hardware: NXP LPC2378, NXP LPC2148, ADC, DAC, DIO, Bronkhorst IQFlow
  • Remote work

Amplifier Development (EMC Environment)

Senior Software Architect/Developer

• Industry: Electrical Engineering / Measurement Instruments
• Role: Architecture / Implementation / Integration
  • Development of embedded software for a modular broadband amplifier system
  • Review of the existing solution with respect to architecture, build system, and modularization
  • Architecture design using UML, especially statecharts
  • Creation of a new build system using CMake
  • Linux kernel programming: implementation of CAN bus drivers
  • Complete reimplementation of the CAN bus layers for the existing software
  • Continuous Integration: setup of the build chain with version control (Git, ClearCase), build server (Hudson), automated test coverage, and firmware generation as a fully automated process
  • Programming language: C/C++
  • Environment: Embedded Linux, Qt 4.7.x, powerpc-gcc, CMake, MS Visual Studio, VMware
  • Hardware: PowerPC 603e, x86, CAN bus, FPGA, PCI bus
  • Tools:
    • Requirements: IBM Rational DOORS
    • Bug tracking: IBM Rational ClearQuest
    • Version control: SVN, IBM Rational ClearCase

Embedded Device Development

Senior Software Developer

• Industry: Security Sector (Government)
• Role: Implementation / Release Management / Integration
  • Development of a proof-of-concept solution
  • Programming of specific modules (User Interface, Self-Test, etc.) for the production version
  • Implementation work for secure messaging to smartcards
  • Communication and coordination with external service providers
  • Acceptance testing of deliverables from external service providers
  • Continuous Integration: setup of build chain with version control (SVN), build server (Bamboo), automated test coverage, and firmware generation as an automated process
    • Shell scripting: Bash and Windows PowerShell
    • Programming language: C/C++
    • Environment: Embedded Linux, Qt 4.6.x, arm-gcc, CMake, MS Visual Studio, VMware
    • Hardware: Freescale i.MX51, Cirrus EP9301, Intel Atom, Smartcards
    • Special technologies: Secure Boot, SOAP, PKI, PC/SC
    • Tools:
      • Project management: Instep
      • Bug tracking: Jira
      • Static code analysis: Klocwork
      • Debugging: Insight

Document Control System

Senior Software Developer

• Industry: Security Sector (Government)
• Role: Implementation
  • Integration of hardware components into the overall system (fingerprint reader, camera, external displays)
  • Communication between components over the network
  • Programming languages: Java J2EE, C/C++
  • Environment: Eclipse, MS Visual Studio
  • Tools: C/C++, Boost, log4cxx, Cognitec SDK, Canon SDK
  • Java stack: JBoss, Hibernate, Log4j

Multimedia Consulting

Senior Software Developer

• Industry: Security Sector
• Role: Analysis and Implementation
  • Consulting in the area of video encoding
  • Architecture and implementation of an MPEG-2 transport stream analyzer
  • Contribution to the open-source project ffmpeg
    • Programming language: C/C++
    • Environment: Windows, Fedora 11/12 x64 Linux
    • Tools: ffmpeg, VLC, mplayer
    • Multimedia: MPEG-2 Transport Stream (ISO 13181-1), MPEG-2 Video, H.264, STANAG 4609

NGN - New Generation Networks / VoIP (HiQ)

Senior Software Developer

• Industry: Telecommunications
• Role: Analysis and Implementation
  • Implementation of various services in a VoIP server (Soft-PBX)
  • Services: Lawful Interception, Parallel Ringing, Serial Ringing, Music On Hold
  • Software installation
  • Handling of change requests
  • Creation of test scenarios
  • Programming language: C/C++
  • Environment: Solaris, Linux, ClearCase, ClearQuest, TestDirector, make
  • Protocols: SIP, SDP, MGCP, RTP, 3GPP IMS, Mobile Centrix, SOAP

Video Telephony (H.324M) with Asterisk

Senior Software Developer

• Industry: Telecommunications
• Role: Analysis and Implementation
  • Analysis of an existing video telephony solution
  • Implementation work within the Asterisk PBX for H.324M
  • Bug fixing of the H.324M stack
  • Delivery of patches for the Fontventa H.324M stack
  • Testing with Nokia N73 and Motorola K3
  • Programming languages: C, Java, Perl
  • Environment: Linux, gcc, Eclipse

System Architecture for IPTV

System Engineering

• Industry: Telecommunications
• Role: System Engineering
  • Development of various system architectures for an IPTV system
  • Description of client architecture and backend architecture (CMS) as well as the CDN (Content Delivery Network)
  • Evaluation of different IPTV technologies: Multicast, Unicast, Peer-to-Peer
  • Evaluation of various IPTV platforms: Microsoft Windows Media / MSTV, Adobe Flash, RealNetworks

Implementation Work for a Document Control System

Senior Software Developer

• Industry: Security sector (government environment)
• Role: Implementation
  • Programming a GUI for an image processing framework: GUI logic, mainframe, and various dialogs
  • Using the Qt GUI framework from Trolltech
  • Controlling hardware: camera, lighting, positioner
  • Data storage in an SQL database (MySQL)
  • Reading configuration data using DOM XML parser
  • Output of statistical data via XML
  • Protection against unauthorized copying using a dongle from WiBu-Systems
  • System installation
    • Programming language: C++
    • Libraries: Qt 4.3.x (Trolltech), Boost
    • Environment: Windows XP, MS Visual Studio 2005

IMS Services in the Telecommunications Environment

Senior Software Developer

• Industry: Telecommunications
• Role: Implementation and Testing
  • Implementation of SIP services on the Nokia Siemens Networks Advantage platform
  • Implementation of a charging interface in a 3GPP IMS Application Server / B2B User-Agent
  • Development of the test environment for the 3GPP IMS Application Server / B2B User-Agent
  • Parsing ASN.1 data using Perl scripts for automatic documentation generation
  • Use of regular expressions in Perl and Java
  • Remote debugging with Eclipse (Solaris/Windows XP)
  • Creation of a test system:
    • Defining test script syntax
    • Designing a script interpreter (Java)
    • Controlling the test system with Perl scripts
  • Environment:
    • Programming language: Java 1.5 (Java SE 6)
    • Protocols: SIP, SDP, RTP, ASN.1
    • Environment: Solaris 10, Eclipse, Perl, codegen

MPEG-2 Transport Stream Multiplexer

Senior Software Developer

• Industry: TV Broadcasting
• Role: Implementation
  • Design and implementation of an MPEG-2 Transport Stream multiplexer.
  • Processing of MPEG-4/AVC or H.264 video streams and MPEG-4 AAC HE audio streams.
  • Testing with set-top boxes from Pace, Amino, and Stino.
  • Environment:
    • Programming Language: C++
    • Protocols: MPEG-2 Systems
    • Tools: VLC, mplayer, MS DirectShow
    • Development Environment: MS Visual Studio .NET 2003, Cygwin, GCC

IMS Videosharing/VoIP

System Engineering and Implementation

• Industry: IMS Videosharing/VoIP
• Role: Implementation
  • Development of use cases, requirements, specifications, architecture, and implementation for a system enabling real-time audio/video streaming between mobile devices (full duplex).
  • Environment:
    • Programming Languages: C/C++, C#, Visual Basic
    • Environment: 3GPP IMS, IPv6
    • Codecs: Video – MPEG-4, H.264; Audio – AMR, AMR-WB
    • Development Platform: Windows Mobile 5.x, Intel XScale PXA27x

IMS Services

Systems Architect

• Industry: Telecommunications
• Role: Systems Engineering
  • Development of system specifications for IMS services. Work focused on Push-To-Talk, Video Sharing, Presence, and other IMS-related services. Creation of use cases, requirements, and overall system architecture.

AUTOSAR

Systems Architect

• Industry: Automotive
• Role: Systems Engineering
  • Work in the automotive domain: review of AUTOSAR specifications, development of solutions within the AUTOSAR standardization process.

SigComp (IETF)

Systems Architect

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Design, architecture, and implementation of the Signal Compression Layer (SigComp). Implementation in C for an embedded platform.

IMS Video Sharing

Systems Architect

• Industry: Telecommunications
• Role: Systems Engineering
  • Architecture design for 3GPP IP Multimedia calls in the IMS.
  • Creation of call flows, definition of requirements, and design of architecture components for mobile phone clients.

Push-To-Talk (PoC)

Systems Architect

• Industry: Telecommunications
• Role: Systems Engineering
  • Software architecture design and planning for PoC and video streaming in the mobile domain on the client side. Design specifications for embedded platforms (Apoxi, embedded Linux). Representation of the client at the Open Mobile Alliance (OMA).

IMTC Conformance Testing

Software Developer

• Industry: Telecommunications
• Role: Implementation and Testing
  • Representation of the client at the IMTC
  • Management and execution of conformance tests for video/audio codecs and the 3GPP file format within the IMTC organization.
  • Environment:
    • Programming Languages: C/C++, Perl, Visual Basic
    • Protocols: MPEG-4/H.263, AMR, AAC
    • Environment: ARM Toolchain, Visual Studio, gcc

Multimedia Framework for Mobile Devices

System Engineer

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Development of the architecture and components for a middleware multimedia framework (similar to DirectShow) for mobile devices (Nucleus/APOXI).

Transmission of Multimedia Data over Mobile Networks

Research Associate

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Setup and development of a simulation environment for optimized video data transmission using EGPRS and WLAN. Protocols used: RTP, UDP, IP, EGPRS, and IEEE 802.11b. Video standards used were MPEG-4 and H.264 (AVC).

MPEG-4 Content Management

Research Associate

• Industry: Telecommunications
• Role: Implementation
  • Analysis and development related to the storage of multimedia content in the MPEG-4 file format.

Virtual 3D Video Conferencing Systems

Research Associate

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Development of the foundations for future 3D video conferencing systems using multiple camera setups.

Contribution to the Development of the MPEG-4 Video Standard

Research Associate

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Temporary supervision of the EU project MoMuSys as well as the development and implementation of own algorithms for MPEG-4.

Fast Motion Estimation in MPEG Encoding

Research Associate

• Industry: Telecommunications
• Role: Implementation
  • Implementation of fast motion estimation methods in MPEG-2 and MPEG-4 video compression. Development in Intel assembler using MMX and SSE extensions.

Fractal Image Coding

Research Associate

• Industry: Telecommunications
• Role: Systems Engineering and Implementation
  • Development of an image coding system using fractal methods and algorithms. Implementation using object-oriented methods in C++.

DIY Project: Z80 PC

Apprentice

• Industry: IT
• Role: Implementation
  • Construction of a Z80 PC, including creating the circuit boards, soldering, and troubleshooting using an oscilloscope.
  • Development of a keyboard controller with Z8 CPU
  • Development of a floppy disk controller
  • Implementation of the BIOS in assembler
  • Adaptation of CP/M

Technische Universität Berlin

Specialization in Telecommunications and Networks

Lufttechnische Anlagen Berlin